Potential switching apparatus for power adapter

Abstract

A potential switching apparatus for a power adapter which transforms input power to output power delivered through a power output cord. The potential switch apparatus switches the potential of the output power. It includes a first body and a second body located on the power output cord. The first body has a first contact and a second contact. The second body has a switch element connectable to the first contact to deliver the output power at a first potential and connectable to the second contact to deliver the output power at a second potential. Thus the potential of the output power can be switched. The present invention improves the conventional potential switch device on the power adapter that is too bulky in size.

1. A potential switching apparatus for a power adapter which transforms input power to output power delivered through a power output cord at a potential switchable by the potential switching apparatus, comprising:
 a first body which is located on the power output cord and has a first contact and a second contact; and 
 a second body which is located on the power output cord and has a switch element corresponding to the first contact and the second contact, the switch element being connectable to the first contact to deliver the output power at a first potential and connectable to the second contact to deliver the output power at a second potential; 
 wherein the potential switching apparatus is outside of a body of the power adapter. 
 
     
     
       2. The potential switching apparatus of  claim 1 , wherein the first body has a shifting element connecting to the power output cord, the first contact and the second contact being located on the shifting element. 
     
     
       3. The potential switching apparatus of  claim 2 , wherein the second body has an turning axle running through the shifting element such that the second body is turnable against the shifting element to form a turning displacement, the switch element being connectable to the first contact or the second contact in the turning displacement to allow the output power to be delivered at the first potential or the second potential. 
     
     
       4. The potential switching apparatus of  claim 3 , wherein the turning axle runs through a retaining member located on the first body to form a displacement against the retaining member. 
     
     
       5. The potential switching apparatus of  claim 4 , wherein the turning axle has a detent member to harness the shifting element in the displacement. 
     
     
       6. The potential switching apparatus of  claim 4 , wherein the second body has a switch stem running through the retaining member, the switch stem having a holding portion located on the switch element and an anchor portion, the retaining member having a first anchor hole and a second anchor hole to form an anchoring relationship with the anchor portion in the turning displacement of the second body. 
     
     
       7. The potential switching apparatus of  claim 6 , wherein the first anchor hole and the second anchor hole communicates with each other and are interposed by a restriction zone. 
     
     
       8. The potential switching apparatus of  claim 7 , wherein the anchor portion is formed at a diameter greater than that of the restriction zone which is greater than the holding portion. 
     
     
       9. The potential switching apparatus of  claim 6 , wherein the second body and the switch stem have respectively a first coupling portion and a second coupling portion that are coupled with each other. 
     
     
       10. The potential switching apparatus of  claim 4 , wherein the retaining member has a retaining cavity to hold a spring and a retaining ball braced by the spring, the second body having two sliding tracks latched by the retaining ball in the turning displacement. 
     
     
       11. The potential switching apparatus of  claim 4 , wherein the retaining member and the first body have respectively a fastening stub and a holding trough that are engaged with each other. 
     
     
       12. The potential switching apparatus of  claim 2 , wherein the power output cord includes a first cable connecting to the power adapter and running through the first body and connecting to the shifting element, and a second cable running through the second body and connecting to the shifting element. 
     
     
       13. The potential switching apparatus of  claim 12 , wherein the shifting element is an adapter circuit board which has power ports connecting to the first cable and the second cable. 
     
     
       14. The potential switching apparatus of  claim 2 , wherein the shifting element and the first body have respectively a coupling member and a coupling trough corresponding to and engaged with each other for anchoring. 
     
     
       15. The potential switching apparatus of  claim 2 , wherein the first body has a braking portion to harness the shifting element. 
     
     
       16. The potential switching apparatus of  claim 1 , wherein the first body has an upper case and a lower case corresponding to and coupled with each other.